Croton & Catskill/Delaware Watersheds

The New York City (NYC) water supply system is one of the largest surface water storage and supply systems in the world. In the United States, New York City is one of five metropolitan areas still supplying unfiltered surface water to its City residents.

The system reliably delivers more than 1.1 billion gallons of safe drinking water daily to nine million people – this represents nearly half the population of all New York State.

The NYC water supply system consists of three surface water sources:

the Croton watershed (375 acres) east of the Hudson River

the combined Catskill and Delaware watershed system (1,597 acres) west of the Hudson River.